* Commodities strong; dlr weakness lifts oil, metal prices
* Banks higher, helped by broker strategy upgrade
* Shire among handful of fallers after broker downgrade
By Tricia Wright
LONDON, Oct 6 (Reuters) - Britain's top share index was up 1.6 percent at midday on Tuesday, driven by gains from miners and energy stocks buoyed by firmer commodity prices, and with banks on the rise helped by a broker strategy upgrade.
At 1118 GMT, the FTSE 100 <
> was up 79.58 points at 5,103.91, after closing 0.7 percent higher on Monday."A good rebound... we had a (bad) figure in the UK -- the industrial production figures on the manufacturing side -- but it just goes to show you that the UK is totally inconsequential to the FTSE 100," said Mike Lenhoff, chief strategist at Brewin Dolphin.
British industrial output in August fell unexpectedly and at its sharpest monthly pace since January, official data showed on Tuesday, dampening expectations for a strong rebound in growth in the third quarter of this year. [
]Energy stocks gained as crude prices <CLc1> rose above $71 a barrel, helped by a fall in the dollar after a report Gulf Arab states were in talks to replace the U.S. unit with a basket of currencies in oil trading.
Royal Dutch Shell <RDSa.L>, BP <BP.L> and BG Group <BG.L> added between 1.7 percent and 2 percent.
Dollar weakness also underpinned higher metals prices, with gold rallying to an 18-month high, boosting the mining sector.
Antofagasta <ANTO.L>, Eurasian Natural Resources <ENRC.L>, Rio Tinto <RIO.L>, Kazakhmys <KAZ.L> and Xstrata <XTA.L> put on 2.7-5.3 percent.
Banks built on Monday's gains, buoyed by a BofA Merrill Lynch strategy upgrade of the sector to 'overweight', with HSBC <HSBA.L>, Barclays <BARC.L>, Royal Bank of Scotland <RBS.L> and Lloyds Banking Group <LLOY.L> adding 1.1-2.7 percent.
Standard Chartered <STAN.L>, helped also by a target price hike from Credit Suisse to 1,185 pence from 1,600 pence, climbed 2.3 percent.
Investors also digested a 4.8 billion euro capital raising by French bank Societe General <SOGN.PA> to enable it to repay state support and pursue growth opportunities. [
]A Citigroup upgrade to 'buy' from 'hold' helped Rolls-Royce <RR.L>, up nearly 4 percent, with the broker hiking its target price for the engineer to 550 pence from 465 pence, saying it saw upside risk to estimates.
U.S. stocks indices looked set to build on gains made Monday when ISM data showed the economy's critical services sector expanded for the first time since August 2008.
SHIRE BIG FALLER
Drugmaker Shire <SHP.L> was among a handful of FTSE 100 fallers, off 2.1 percent, pressured by a UBS downgrade to 'neutral' from 'buy' on valuation grounds.
GlaxoSmithKline <GSK.L>, however, rose 1.1 percent, boosted by support for its experimental kidney cancer drug Votrient. [
]The FTSE 100 has surged 47.5 percent since hitting a six-year trough in March, though is still down 5.8 percent from its level in mid-September 2008 before the collapse of Lehman Brothers.
"The FTSE 100 is geared towards the global economy, and the global economy is being led by Asia at the moment, and pretty soon also by clearly America, and that's where the newsflow is strongest and best and most supportive," Lenhoff said.
Strong newsflow came from Australia on Tuesday, where the Reserve Bank of Australia confirmed the relative strength of the Australian economy by raising its cash interest rate by 0.25 point to 3.25 percent. [
] (Editing by Dan Lalor)